The Vanity Fair Tribeca Film Festival party attracted a fashionable crowd. Designers including Diane von Furstenberg, Tory Burch, and Donna Karan attended the fete, alongside celebrities like Catherine Zeta Jones, Dakota Fanning, and Helena Christensen. But the stand-out of the evening definitely goes to Leelee Sobeski, who took a risk in a white, minimalist floor-length gown from Jil Sander's Spring 2012 collection.